They do not need to read you your Miranda rights to question you, no. They only read you your rights if you are being detained. But they are free to use anything you say before or after if for some reason you wind up in court.

Here’s a corroborating source: https://www.lawinfo.com/resources/criminal-defense/when-must...

Movies are often really wrong about lots of things in the criminal justice system.

Thanks for the link. It makes sense.

Hopefully I will never need to put my newly acquired knowledge to a test.

Miranda is for when they're getting read to arrest you. Before that it's just a convo between you and the cop, which can be used in court, that's why people say to keep it to talk about whatever they pulled you over for. You don't have to tell them where you're coming from or where you're going for example.